I do not tie/sew a loop in either end of the lines I have. But the side closest to the cockpit I tie what I believe to be a "water knot" in and around a metal loop. This knot is as strong as sewn loops. The other end is attached to a cleat at the bow.
I will admit, not sure if it meets the ISAF stds at noted in the SA thread. But for me here in the salish sea, where it is nice to have the knowledge if I or crew does loose footing, they will not go far overboard if at all.
The webbing is typical 1" material found at REI in the climbing section. Material I have hung off of rock cliffs, ice crevass's etc. A lot of the sailing fall protection material comes from the climbing side of things. I do a every 2 season replacement of this webbing. Its only about $1 a foot. so pretty cheep on that end of things. May not be as UV/IR resistant as some jacklines at two to three times the cost......
If I was going offshore.......would probably have a slightly different setup, maybe with heavier material that I know meets the ISAF minimums, but for stronger wind, heavier sea days here in puget sound, what I have works.
I do not see any place that has a "jacklines need to be put here" style of rule. Only a general put them so you can be tied in anywhere. It may mean a couple or three lines per side from front to rear, and you will need a harness with 2 clip on attachments, so when going from on to the other, you are not unclipping yourself per say.